RE: GAS-L: Gasification = mass burn incineration?

["Ron Bailey" <rbaileys@prmenergy.com>]

Dear Len:

Are there any State Air Resources Boards that do permit gasifiers or any
other facilities before they meet all clean air standards?

Ron Bailey
rbaileys@prmenergy
http://www.prmenergy.com


 -----Original Message-----
From: 	Len Walde [mailto:sigma@ix.netcom.com]
Sent:	Tuesday, April 30, 2002 11:13 AM
To:	Weststeijn, Andries; 'Berton, Fernando'
Cc:	gasification@crest.org
Subject:	Re: GAS-L: Gasification = mass burn incineration?

Hi:
As matter of interest, a biomass gasifier project was recently dropped here
in No. Calif., when the State Air Resources Board advised that it would be
permitted only after it was proved that it met all clean air standards.

That is all the info. I have.

Best,
Len

----- Original Message -----
From: "Weststeijn, Andries" <Andries.Weststeijn@essent.nl>
To: "'Berton, Fernando'" <FBerton@CIWMB.ca.gov>
Cc: <gasification@crest.org>
Sent: Tuesday, April 30, 2002 7:03 AM
Subject: RE: GAS-L: Gasification = mass burn incineration?


> Fernando,
>
> Are you differentiating between toxic concentrations (in the product gas
or
> flue gas) and absolute quantities released?
>
> Generally speaking, I could imagine that the toxic concentrations in the
> product gas from oxygen gasification are higher than in the (diluted) flue
> gas from burning. But also, that there could be an advantage in removing
the
> toxic components from the smaller quantity of higher concentrated product
> gas.
> I can see a parallel with sulfur removal after coal gasification: i.e.
> removal of a higher concentration of sulfur from a smaller volume of coal
> gas, than removing that same amount of sulfur from a higher volume of flue
> gas from coal burning (diluted with lots of nitrogen from the combustion
> air).
>
> Your message quotes one specific project which intends to gasify selected
> "cellulosic material with recyclables and plastics removed". Sounds pretty
> clean to me! That for this project absolute emissions from this selected
> cellulosic fuel would be "equal or greater than mass burn incineration"
> doesn't appear to be logical.
>
> It looks to me that the key of your question is in the specific
gasification
> fuels chosen by USEPA for comparison with general mass waste incineration.
> Also, clearly, the technological level of gas and flue gas cleaning
> considered (or predicted) by USEPA for each route is of importance.
>
> I could imagine the following sequence of comparisons:
> 1) compare landfill with mass solid waste incineration (combustion)
> 2) select certain higher potential waste fuels from incineration
> 3) optimize specific emissions controls going with the dedicated
> gasification of these selected fuels
> 3) compare emissions of gasification of selected waste fuels with mass
solid
> waste incineration (not landfill).
>
> best,
> Andries
>
> -----Original Message-----
> From: Berton, Fernando [mailto:FBerton@CIWMB.ca.gov]
> Sent: Monday, April 29, 2002 11:18 PM
> To: 'gasification@crest.org'
> Subject: GAS-L: Gasification = mass burn incineration?
>
>
> This statement was recently made in a letter to the California Integrated
> Waste Management Board (CIWMB) and I would like opinions from experts as
to
> the veracity if this claim.  The CIWMB has been interested in using
> gasification of solid waste as an alternative to landfilling and is aware
of
> one facility in Woolongong, Australia that is in shakedown mode.  There is
> one project proponent in California that would gasify cellulosic material
in
> which all recyclables and plastics have been removed.  Given this
particular
> feedstock, is the following statement accurate.
> "One analysis by the US EPA would appear to suggest toxic air emissions
from
> gasification of solid waste equal to or greater than mass burn
> incineration."
> Another question:  What is the difference between starved air combustion
and
> gasification/pyrolysis.  My sense of the latter is that it is in an
> oxygen-depleted environment thus not allowing combustion.  I liken it to
> baking a lasagna instead of barbecuing a steak.  Is that an accurate
> metaphor?
>
>
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